Valve



R. P. HANSON Nov. 10, 1936.

VALVE Filed May 14, 1934 Patented Nov. 10, 1936 PATENT OFFICE VALVERobert P. Hanson, Portland, 0reg., assignor to Electric Steel FoundryCompany, Portland,

Oreg.

Application May 14, 1934, Serial No. 725,610

2 Claims.

This invention relates generally to valves, and particularly to gatevalves.

The main object of this invention is the provision of an improved formof gate valve for handling liquids in which an appreciable amount ofsolids is carried in suspension.

The second object is to construct a gate valve which will not berendered inoperative due to the accumulation of solids in the gaterecess.

The third object is to construct a gate valve in which the scouringaction produced by liquids passing through the valve is minimized.

These, and other objects, will become more apparent from thespecification following as illustrated in the accompanying drawing, inwhich:

Fig. 1 is a front elevation of the valve with parts broken away invertical section.

Fig. 2 is a vertical section taken along the line 22 in Fig. 1.

Fig. 3 is a horizontal section along the line 3-3 in Fig. 1.

Fig. 4 is a fragmentary vertical section along the line 44 in Fig. 1showing the gate in a closed position.

Fig. 5 is a section taken along the line 5-5 in Fig. 1 showing the gatein an open position.

Fig. 6 is a perspective view of the gate follower.

Similar numbers of reference refer to similar parts throughout theseveral views.

Referring in detail to the drawing, there is shown a valve body I0provided with the usual flanges H by means of which the valve isinterposed between the pipe sections l2 and secured thereto by the bolts13. The valve body ID has formed therethrough a rectangular slot 14which forms a guide for the gate l5 whose lower end I6 is rounded toconform with the lower portion of the valve opening ll, and the end I9is connected by the tangent lines l8 to the sides l9 of the valve I5 bya small shoulder 20 which is used for scraping purposes.

The valve body In is extended laterally along the gate I5 in the form ofa rectangular neck 2| at whose end is formed a stuffing box 22 whichreceives the gland 23 by means of which the packing 24 is held againstthe gate 15.

The valve body I0 is split transversely through the neck 2| forconstruction purposes, the halves being joined by means of the bolts 253To the neck 2| is secured a yoke 26 on whose upper end is journaled ahand wheel 21 through which is threaded a screw 28 whose lower end isattached to the gate l5. Obviously, any other form of gate operatingmechanism can be employed without departing from the spirit of thisinvention.

With the exception of the precise form of gate end IS the device thusfar described is quite similar to devices now on the market.

The improvement which I am about to describe resides in a gate follower29 which is disposed in the slot I4 and, in reality, constitutes anextension for the gate l5. The member 29 is curved on its edge 30 toconform approximately with the edge 3| of the gate I5, except that itwill be found desirable to run the tangent sides 32 to a chisel-shapedpoint 33 at the intersection with the parallel sides 34.

The follower 29 is provided with slots 35 into which extend the stoppins 36. The follower 29 is normally urged upwardly by the springs 3'!which are confined within the enlarged recess 38 between the shoulders39 of the follower 29 and the cover plate 40, which is secured acrossthe follower end of the slot M by means of the bolts 4|. The springs 31are mounted on the posts 42 which also serve as stops for the follower29.

It can be seen from the foregoing that in the operation of the valvewhen it is in an open position (as shown in Fig. 1) the follower 29moves to its innermost limit imposed by the stop pins 36, under theurging of the springs 31. It is assumed that paper mill stock or otherliquid containing an appreciable quantity of solids, is passing throughthe valve. Obviously, this material cannot accumulate in the spaceoccupied by the follower 29, nor can it exert a scouring action againstthe Walls of the slot 14, thereby greatly adding to the life of thevalve.

When the valve is closed by the rotation of the hand wheel 21, or anyother mechanism used, the gate 15 moves across the opening I! until theedge 31 engages the edge 30 of the follower 29, and the continuedmovement of the gate [5 moves the follower 29 out of the way and thegate end l9 occupies a portion of the space formerly occupied by thefollower 29, completing the seating of the valve.

Much difiiculty is experienced, especially in paper mill work, whenfibrous particles accumulate in the gate pockets and the accumulation issolidified by each closing of the valve until it actually prevents itsclosing, or permits the valve to be injured by its closing mechanism.

I claim:

1. A gate valve of the class described in which the gate consists of aflat plate adapted to slidably pass through a stuffing box, the sides ofwhich are parallel, the innermost ends of the edges of said plate beingprovided with scrapers and a follower for said valve conforming in shapeto the end of said gate.

2. In a gate valve of the class described, a body including a stuflingbox, said body and stuffing box forming a guide of rectangular crosssection extending across the valve opening, a gate consisting of a flatplate within said guide and extending through said stufiing box andhaving a rounded end adapted to form a closure for the 10 valve opening,said rounded end terminating in two tangent edges which terminate inshoulders at the edges of the gate, and a spring urged follower for saidgate having parallel edges and having stops for limiting the movement ofsaid follower to the edge of the valve opening, the edge of saidfollower adjacent to said gate conforming to the shape of said gate inorder to prevent the packing of fibrous material between said gate andfollower.

ROBERT P. HANSON.

